The arena is hosting an indoor maths festival, called Maths Mash Up 12. Unfortunately, ticket sales are surprisingly slow. The arena hopes to attract more ticket sales by holding free-ticket raffles. In the first raffle, winning tickets are a factor of 60. Click on the winning tickets. 25 11 17 6 0 36 29 9 80 1 19 60 31 4 22 20 55 50 21 12